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  • LM2907 Frequency to Voltage Converter

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LM2907 Frequency to Voltage Converter

  • Stock: 3
  • SKU: 0814 | DAA075
  • Rs. 218.30 (inc GST)
    Rs.185.00 + GST

    Qty :

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LM2907 Frequency to Voltage Converter

The LM2907, LM2917 series are monolithic frequency to voltage converters with a high gain op amp/comparator designed to operate a relay, lamp, or other load when the input frequency reaches or exceeds a selected rate.

The tachometer uses a charge pump technique and offers frequency doubling for low ripple, full input protection in two versions (LM2907-8, LM2917-8) and its output swings to ground for a zero frequency input.

LM2907 frequency to voltage converter is fully compatible with the tachometer and has a floating transistor as its output. This feature allows either a ground or supply referred load of up to 50 mA. The collector may be taken above VCC up to a maximum VCE of 28V. The two basic configurations offered include an 8-pin device with a ground referenced tachometer input and an internal connection between the tachometer output and the op amp non-inverting input. This version is well suited for single speed or frequency switching or fully buffered frequency to voltage conversion applications.

Features of LM2907

  • Ground referenced tachometer input interfaces directly with variable reluctance magnetic pickups

  • Op amp/comparator has floating transistor output

  • 50 mA sink or source to operate relays, solenoids, meters, or LEDs

  • Frequency doubling for low ripple

  • Tachometer has built-in hysteresis with either differential input or ground referenced input

  • Built-in zener on LM2917

  • ±0.3% linearity typical

  • Ground referenced tachometer is fully protected from damage due to swings above VCC and below ground

Applications of LM2907

  • Over/under speed sensing

  • Frequency to voltage conversion (tachometer)

  • Speedometers

  • Breaker point dwell meters

  • Hand-held tachometer

  • Speed governors

  • Cruise control

  • Automotive door lock control

  • Clutch control

  • Horn control

  • Touch or sound switches

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